Bently Nevada 3300 NSv Proximity Probes: 330904-00-10-05-02-05

Technical Dossier

Product Details And Specifications

Bently Nevada 3300 NSv Series Technical Notes

The Bently Nevada 3300 NSv series represents one of the most widely deployed proximity probe systems in global heavy industry. Installed across petrochemical refineries, nuclear power stations, offshore platforms, and large-scale rotating machinery facilities, the 3300 NSv system provides continuous, non-contact measurement of shaft radial vibration, axial position, and differential expansion. Its eddy-current sensing principle operates without physical contact with the target shaft, making it the standard reference for API 670-compliant machinery protection in critical rotating equipment including steam turbines, gas compressors, centrifugal pumps, and gearboxes. The system architecture integrates probes, extension cables, and Proximitor sensors into a calibrated measurement chain, each component matched by gap voltage, sensitivity, and cable length to maintain system accuracy within ±1% of full scale.

The Evolution of 3300 NSv Architecture

The 3300 NSv series was introduced as a direct successor to the earlier 3300 XL and 3300 5mm/8mm probe families, consolidating probe diameter options and standardizing the Proximitor sensor interface. Early 3300-series hardware used discrete analog signal conditioning with fixed sensitivity outputs (typically 200 mV/mil or 7.87 V/mm). The NSv designation introduced enhanced electromagnetic compatibility (EMC) shielding and revised connector geometry to reduce installation errors in high-interference environments such as motor control centers and variable frequency drive enclosures.

Compatibility across generations is a documented engineering concern. The 3300 NSv probes are not interchangeable with 3300 XL probes without recalibration of the associated Proximitor sensor, as the target material compensation curves differ. Extension cables must be matched to probe type and total system cable length; mismatched cable lengths shift the gap voltage calibration curve and introduce measurement offset errors. For installations migrating from legacy 3300 5mm systems, Bently Nevada issued field retrofit kits, but these are no longer in production. DriveKNMS maintains cross-reference documentation for legacy-to-NSv migration and can supply matched probe-cable-Proximitor sets for retrofit projects.

3300 NSv Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified, commonly stocked components within the Bently Nevada 3300 NSv proximity probe system. Each entry reflects a distinct hardware configuration defined by probe diameter, cable length, connector type, and Proximitor sensitivity range.

330900-00-05-10-02-00: 5mm NSv probe, 0.5m integral cable, standard tip, 200 mV/mil sensitivity.
330900-00-05-10-02-05: 5mm NSv probe, 0.5m cable, extended temperature rating to 177°C.
330900-00-08-10-02-00: 8mm NSv probe, 0.5m integral cable, 200 mV/mil, general-purpose radial vibration.
330900-00-08-10-02-05: 8mm NSv probe, 0.5m cable, high-temperature variant for turbine bearing housings.
330901-00-05-10-02-00: 5mm NSv probe, 1.0m integral cable, standard sensitivity, radial vibration.
330901-00-08-10-02-00: 8mm NSv probe, 1.0m integral cable, 200 mV/mil, axial position measurement.
330902-00-05-10-02-00: 5mm NSv probe, 2.0m integral cable, standard tip geometry.
330902-00-08-10-02-00: 8mm NSv probe, 2.0m integral cable, differential expansion monitoring.
330903-00-05-10-02-00: 5mm NSv probe, 3.0m integral cable, extended reach for deep bearing housings.
330903-00-08-10-02-00: 8mm NSv probe, 3.0m integral cable, standard radial vibration configuration.
330904-00-10-05-02-05: 8mm NSv probe, 4.0m integral cable, high-temperature, extended cable, API 670 compliant — the primary SKU of this listing.
330905-00-08-10-02-00: 8mm NSv probe, 5.0m integral cable, long-reach installation for large turbine casings.
330130-080-00-00: 3300 NSv Proximitor sensor, 8mm target, 200 mV/mil output, DIN rail mount.
330180-51-00: 3300 NSv extension cable, 5.0m, armored, matched to 8mm probe systems.
330180-91-00: 3300 NSv extension cable, 9.0m, armored, for remote Proximitor mounting configurations.
330185-02-05: 3300 NSv Proximitor sensor, high-temperature housing, 177°C ambient rating.
330750-02-00: 3300 NSv power supply module, 24 VDC input, dual-channel Proximitor supply.
21504-00-01-00: Proximitor sensor, 5mm target, 200 mV/mil, legacy-compatible NSv interface.

Sourcing Hard-to-Find & Obsolete 3300 NSv Parts

The Bently Nevada 3300 NSv series has entered the mature-to-declining phase of its product lifecycle. Baker Hughes (the current owner of the Bently Nevada brand) has progressively shifted new installations toward the 3500 series machinery protection system, which offers digital communication via System 1 software integration. As a result, several 3300 NSv probe configurations, extension cables, and Proximitor sensor variants have been discontinued from the standard Baker Hughes price list.

Quality Control for the 3300 NSv Range

The 3300 NSv measurement chain requires system-level verification rather than component-level testing in isolation. DriveKNMS applies the following test protocol to all 3300 NSv components prior to shipment:

Gap voltage calibration check: Each probe is tested against a certified AISI 4140 steel target at defined gap increments (0.25mm steps from 0.5mm to 2.5mm) to verify the output voltage curve matches the Bently Nevada factory specification within ±2%.
Proximitor sensor output linearity: The Proximitor sensor is powered at 24 VDC and its output is measured across the full gap range to confirm linearity and sensitivity (200 mV/mil ±1%).
Cable continuity and insulation resistance: Extension cables are tested for conductor continuity, shield integrity, and insulation resistance (>100 MΩ at 500 VDC) to detect degradation from thermal cycling or mechanical damage.
Connector inspection: All MIL-spec and Bently Nevada proprietary connectors are inspected for pin alignment, corrosion, and thread integrity under 10× magnification.
High-temperature variant functional test: For SKUs rated to 177°C (including 330904-00-10-05-02-05), thermal soak testing at 150°C for 2 hours is performed to verify dimensional stability of the probe tip and cable jacket.